. Electrical world. 2.—PROCESS OF M.\KIXG impressed at the care bestowed on that part of its organ-ization which relates to securing exact uniformity of product. Previous to the description of the process of mounting glowers,some data may here be given as to their dimensions. At normaltemperatures practically non-conductors of electric current, whenheated the Nernst glower possesses most of the properties of ordi-nary conductors. An exception is with respect to the method ofconduction, but as the electrolytic theory on this point has no bear-ing on what follows, it may be h
. Electrical world. 2.—PROCESS OF M.\KIXG impressed at the care bestowed on that part of its organ-ization which relates to securing exact uniformity of product. Previous to the description of the process of mounting glowers,some data may here be given as to their dimensions. At normaltemperatures practically non-conductors of electric current, whenheated the Nernst glower possesses most of the properties of ordi-nary conductors. An exception is with respect to the method ofconduction, but as the electrolytic theory on this point has no bear-ing on what follows, it may be here ignored. To adapt to differentvoltages and currents, the cross section and length of the glower isconsequently varied as in the case of the incandescent lamp single filament of a 25-cp., 110-volt lamp has a diameter of .025in., and a length over all of .62 in., the corresponding dimensionsfor a 220-volt lamp being .014 in., and i in. In the three. and fusing to this a platinum terminal wire. Thus the troublepreviously met through contraction in the material of the ends,turned to a positive benefit, in that the terminal is thereby more se-curely held. The rods of glower material are cut to a length some-what longer than that of two finished glowers. Each end is thenheated in turn in an electric arc, and as the material softens the endassumes a spherical shape. Then in an flame a plat-inum wire is plunged for a short distance into the heated globule,when a small portion becomes separated at a point where the wirehas been previously nicked, after which the end is again placed inthe arc for an instant. To the platinum globule thus embedded inthe spherical end is then fused the terminal wire with the aid ofan flame. The several stages of this operation are il-lustrated in Fig. 2, but with reference only to a single , the end of the terminal wire is fastened to an aluminumplug which facilitates
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
